package com.nercel.dsj.gksales.util;

import javax.servlet.http.HttpServletRequest;

public class IpUtil {

    public static String getUserIp(HttpServletRequest request) {
        String ipAddress = getXUserIp(request);
        if (ipAddress != null) {
            return ipAddress;
        }
        return getIpAddr(request);
    }

    public static String getXUserIp(HttpServletRequest request) {
        String ipAddress = request.getHeader("X-User-IP");
        if (ipAddress != null && ipAddress.length() > 0) {
            return ipAddress;
        }
        return null;
    }

    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
//                if (ipAddress.equals("127.0.0.1")) {
//                    // 根据网卡取本机配置的IP
//                    InetAddress inet = null;
//                    try {
//                        inet = InetAddress.getLocalHost();
//                    } catch (UnknownHostException e) {
//                        e.printStackTrace();
//                    }
//                    ipAddress = inet.getHostAddress();
//                }
            }
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
                                                                // = 15
                if (ipAddress.indexOf(",") > 0) {
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            ipAddress="";
        }
        // ipAddress = this.getRequest().getRemoteAddr();
        
        return ipAddress;
    }

    public static String getIpFromSohu(){
        String resp = HttpUtil.get("http://pv.sohu.com/cityjson?ie=utf-8", null);
        return resp == null ? "" : resp.replaceAll("[\\s\\S]*var returnCitySN = \\{\"cip\": \"", "")
                .replaceAll("\", \"cid\": \".*?\", \"cname\": \".*?\"};[\\s\\S]*", "");
    }


}
